Grounding resistance testing method and device suitable for railway system

Abstract

The invention provides a ground resistance testing method and device suitable for a railway system, and the method comprises the steps: determining a first inter-electrode voltage value between a tested ground grid and a first potential electrode based on a first testing loop and excitation current provided for the first testing loop, and determining a second inter-electrode voltage value between a tested ground grid and a second potential electrode based on a second testing loop; and determining a second inter-electrode voltage value between the tested ground grid and the second potential electrode according to the first inter-electrode voltage value provided for the first test loop and the excitation current provided for the second test loop, and determining the grounding resistance of the tested ground grid and the soil resistivity of the tested ground grid based on a predetermined correction factor, the excitation current value, the first inter-electrode voltage value and the second inter-electrode voltage value. The compensation resistance is counteracted by adding the test electrode and introducing the correction factor, so that the test method of the grounding resistance is simplified. And the zero potential region does not need to be repeatedly measured and searched, so that errors caused by manually searching the zero potential region are avoided, and the accuracy of the grounding resistance test is improved.

Description

Technical Field

[0001] The present invention relates to the field of rail transportation technology, and in particular to a ground resistance testing method and device suitable for a railway system. Background Art

[0002] Existing railways generally adopt a comprehensive grounding method. By laying through ground wires to connect multiple systems and professional adjacent ground networks in series, a large-scale "comprehensive grounding system" is formed to achieve equal potential, low resistance, and small voltage difference along the entire railway line, thereby improving personal safety and equipment safety levels.

[0003] Ground resistance test is a conventional method to test the performance of comprehensive grounding system. The existing node resistance test is generally based on the straight line three-level method. The potential electrode, current electrode and the grounding body to be tested are arranged on the same straight line. The position where the potential electrode voltage is zero is found by measuring the potential drop curve between the grounding body and the current electrode, and then the grounding resistance value is obtained by Ohm's law.

[0004] The existing method has the risk of error in actual use, that is, when the potential electrode is not in the zero potential zone, the measurement result will have a principle error, and the position of the potential electrode needs to be repeatedly adjusted for calibration. However, the actual situation on site is complicated, and it is often difficult to adjust to the appropriate position, resulting in serious errors in the measurement results. Summary of the invention

[0005] The present invention provides a ground resistance test suitable for a railway system, which is used to solve the defect that measurement results in the prior art are prone to errors and improve the accuracy of the ground resistance test in the railway system.

[0006] The present invention provides a ground resistance testing method applicable to a railway system, comprising the following steps: Determine a first inter-electrode voltage value between the earth network under test and the first potential electrode based on a first test loop and an excitation current provided to the first test loop, wherein the first test loop is constructed based on the earth network under test, the first potential electrode and the current electrode being connected to each other; Based on a second test loop and the excitation current provided to the second test loop, a second inter-electrode voltage value between the measured earth network and the second potential electrode is determined, wherein the second test loop is constructed based on the interconnection of the measured earth network, the second potential electrode and the current electrode, and the distances between the first potential electrode, the second potential electrode and the current electrode are greater than a preset distance threshold, and are dispersedly arranged around the measured earth network; Based on a predetermined correction factor, the excitation current value of the excitation current, the first inter-electrode voltage value and the second inter-electrode voltage value, the grounding resistance of the measured earth grid and the soil resistivity of the measured earth grid are determined, and the correction factor is determined based on the spacing distance between the measured earth grid, the first potential electrode, the second potential electrode and the current electrode.

[0007] According to a ground resistance testing method applicable to a railway system provided by the present invention, the correction factor includes a first test loop correction factor and a second test loop correction factor; The first test loop correction factor is: ; The second test loop correction factor is: ; in, is the first test loop correction factor, is the distance between the measured ground grid and the current electrode, is the distance between the measured ground grid and the first potential electrode, is the distance between the current electrode and the first potential electrode, is the second test loop correction factor, is the distance between the measured ground grid and the second potential electrode, is the distance between the current electrode and the second potential electrode.

[0008] According to a ground resistance testing method applicable to a railway system provided by the present invention, the ground resistance of the ground grid to be measured and the soil resistivity of the ground grid to be measured are determined based on a predetermined correction factor, an excitation current value of the excitation current, the first inter-electrode voltage value and the second inter-electrode voltage value, including: Based on the correction algorithm equation group, determining the ground resistance of the measured ground grid and the soil resistivity of the measured ground grid; The correction algorithm equation group is: ; in, is the grounding resistance of the measured ground grid, is the first inter-electrode voltage value, is the second inter-electrode voltage value, is the excitation current.

[0009] According to a ground resistance test method applicable to a railway system provided by the present invention, after determining the ground resistance of the ground grid to be tested and the soil resistivity of the ground grid to be tested, the method further comprises: Based on the resistance determination equation group, determine the grounding resistance of the first measured earth network and the grounding resistance of the second measured earth network, the measured earth network includes the first measured earth network and the second measured earth network, the first measured earth network is the grounding network corresponding to the tower grounding body, and the second measured earth network is the grounding network corresponding to the machine room grounding body; The resistance determination equation group is: ; in, is the grounding resistance of the first measured ground grid, is the grounding resistance of the second measured ground network, is a shunt current value, which is determined during the test based on a shunt collection coil arranged between the first measured earth grid and the second measured earth grid.

[0010] According to a ground resistance testing method suitable for a railway system provided by the present invention, the spacing distances between the measured ground grid, the first potential electrode, the second potential electrode and the current electrode are determined based on the longitude and latitude of the measured ground grid, the longitude and latitude of the first potential electrode, the longitude and latitude of the second potential electrode and the longitude and latitude of the current electrode.

[0011] The present invention also provides a ground resistance testing device suitable for a railway system, comprising the following modules: A first test module, used to determine a first inter-electrode voltage value between a measured earth network and a first potential electrode based on a first test loop and an excitation current provided to the first test loop, wherein the first test loop is constructed based on the measured earth network, the first potential electrode and the current electrode being connected to each other; A second test module, for determining a second inter-electrode voltage value between the measured earth network and the second potential electrode based on a second test loop and the excitation current provided to the second test loop, wherein the second test loop is constructed based on the interconnection of the measured earth network, the second potential electrode and the current electrode, the distance between the first potential electrode, the second potential electrode and the current electrode is greater than a preset distance threshold, and they are dispersedly arranged around the measured earth network; A grounding resistance determination module is used to determine the grounding resistance of the measured ground grid and the soil resistivity of the measured ground grid based on a predetermined correction factor, the excitation current value of the excitation current, the first inter-electrode voltage value and the second inter-electrode voltage value, wherein the correction factor is determined based on the spacing distance between the measured ground grid, the first potential electrode, the second potential electrode and the current electrode.

[0012] The present invention also provides a testing device, comprising the above-mentioned ground resistance testing device applicable to a railway system.

[0013] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, a ground resistance testing method applicable to a railway system as described in any one of the above methods is implemented.

[0014] The present invention also provides a non-transitory computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the ground resistance testing method applicable to a railway system as described in any one of the above methods is implemented.

[0015] The present invention also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the computer program implements any of the above-mentioned ground resistance testing methods applicable to a railway system.

[0016] The grounding resistance testing method and device for railway systems provided by the present invention offset the compensation resistance by adding auxiliary test poles and introducing correction factors, and construct a solution using an optimized measurement method, thereby simplifying the grounding resistance testing method. There is no need to repeatedly measure and search for the zero potential area, which avoids the error caused by manually searching for the zero potential area, weakens the setting conditions of the auxiliary grounding pole, greatly shortens the test time, and improves the accuracy of the grounding resistance test. With the help of shunt current data collection and the construction of a resistance determination equation group, the grounding resistance identification of different grounding bodies in the integrated grounding system is realized, providing a convenient and reliable solution for the hidden danger investigation work in actual detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a flow chart of a ground resistance testing method applicable to a railway system provided by the present invention.

[0019] Figure 2 It is a schematic diagram of the test structure provided by the present invention.

[0020] Figure 3 It is the equivalent circuit diagram provided by the present invention.

[0021] Figure 4 It is a schematic diagram of the structure of the testing device provided by the present invention.

[0022] Figure 5It is a structural schematic diagram of a ground resistance testing device applicable to a railway system provided by the present invention.

[0023] Figure 6 It is a structural schematic diagram of the electronic device provided by the present invention.

[0024] Reference numerals: 101: test device; 102: first ground network to be tested; 103: second ground network to be tested; 104: shunt collection coil; 105: current electrode; 106: first potential electrode; 107: Second potential electrode. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The related method is to measure the grounding resistance based on the linear three-level method. The linear three-level method measures the grounding resistance by using multiple measurements and repeatedly adjusting the position of the auxiliary grounding electrode. The compensation resistance is reduced to 0 through manual measurement, that is, the zero potential area of ​​the test electrode is found, and finally the real grounding resistance is obtained.

[0027] There is a risk of error in actual use, that is, when the potential electrode is not in the zero potential zone, the measurement result will have a principle error, and the position of the potential electrode needs to be adjusted repeatedly for calibration. However, the actual situation on site is complicated, and it is often difficult to adjust to the appropriate position, resulting in serious errors in the measurement results.

[0028] In view of the defects of the related methods, the present invention provides a ground resistance testing method suitable for railway systems. Figure 1 FIG. 1 is a flow chart of a ground resistance testing method for a railway system provided by the present invention. Figure 1 Said method comprises the following: Step 110, determining a first inter-electrode voltage value between a measured earth network and a first potential electrode based on a first test loop and an excitation current provided to the first test loop, wherein the first test loop is constructed based on the interconnection of the measured earth network, the first potential electrode, and the current electrode; Step 120, determining a second inter-electrode voltage value between the measured earth network and the second potential electrode based on a second test loop and the excitation current provided to the second test loop, wherein the second test loop is constructed based on the measured earth network, the second potential electrode and the current electrode being connected to each other, and the distance between the first potential electrode, the second potential electrode and the current electrode is greater than a preset distance threshold, and they are dispersedly arranged around the measured earth network; Step 130, based on a predetermined correction factor, the excitation current value of the excitation current, the first inter-electrode voltage value, and the second inter-electrode voltage value, determine the grounding resistance of the measured earth grid and the soil resistivity of the measured earth grid, wherein the correction factor is determined based on the spacing distance between the measured earth grid, the first potential electrode, the second potential electrode, and the current electrode.

[0029] The execution subject of the ground resistance test method for railway system provided by the present invention can be an electronic device, a component in an electronic device, an integrated circuit, or a chip. The electronic device can be a mobile electronic device or a non-mobile electronic device. Exemplarily, the mobile electronic device can be a mobile phone, a tablet computer, a laptop computer, a PDA, an ultra-mobile personal computer (UMPC), a netbook, or a personal digital assistant (PDA), etc., and the non-mobile electronic device can be a server, a network attached storage (NAS), or a personal computer (PC), etc., which is not specifically limited by the present invention.

[0030] The following takes the ground resistance testing method applicable to a railway system provided by the present invention executed by a computer as an example to explain the technical solution of the present invention in detail.

[0031] In the preparation stage before the test, three test poles are freely set around the ground network to be tested, including the first point pole, the second point pole and the current pole. Among them, the setting of the test pole only needs to set the current pole at the far end in combination with the actual situation on site, and the distance between them is greater than the preset distance threshold. The preset distance threshold can be set to 5m. It should be noted that the specific selection positions of the three test poles are not limited by the straight line method in the relevant method, and there is no need to repeatedly search for the zero potential area.

[0032] A first test loop and a second test loop are constructed. The first test loop is constructed based on the earth network under test, the first potential electrode and the current electrode being connected to each other. The second test loop is constructed based on the earth network under test, the second potential electrode and the current electrode being connected to each other.

[0033] An excitation current is provided to the first test loop, and data is collected in the first test loop to collect a first inter-electrode voltage value between the ground grid to be tested and the first potential electrode.

[0034] An excitation current is provided to the second test loop, and data is collected in the second test loop to collect the second inter-electrode voltage value between the ground grid to be tested and the second potential electrode.

[0035] The correction factor is determined in advance. The correction factor is used to offset the compensation resistance. Compared with the method of reducing the compensation resistance to 0 by manual measurement using the linear three-level method in the related method, it can avoid large errors and inaccurate tests caused by human factors.

[0036] Based on the predetermined correction factor, the excitation current value of the excitation current, the first inter-electrode voltage value collected in the first test loop, and the second inter-electrode voltage value collected in the second test loop, the grounding resistance of the measured ground grid and the soil resistivity of the measured ground grid are determined to realize the grounding resistance test process of the measured ground grid.

[0037] The grounding resistance test method applicable to the railway system provided by the present invention offsets the compensation resistance by adding an auxiliary test electrode and introducing a correction factor, and uses an optimized measurement method to construct a solution, thereby simplifying the grounding resistance test method. There is no need to repeatedly measure and find the zero potential area, which avoids the error caused by manually finding the zero potential area, weakens the setting conditions of the auxiliary grounding electrode, greatly shortens the test time, and improves the accuracy of the grounding resistance test.

[0038] In one embodiment, the correction factor includes a first test loop correction factor and a second test loop correction factor; The first test loop correction factor is: ; The second test loop correction factor is: ; in, is the first test loop correction factor, is the distance between the measured ground grid and the current electrode, is the distance between the measured ground grid and the first potential electrode, is the distance between the current electrode and the first potential electrode, is the second test loop correction factor, is the distance between the measured ground grid and the second potential electrode, is the distance between the current electrode and the second potential electrode.

[0039] Optionally, the longitude and latitude of the measured ground grid, the first potential electrode, the second potential electrode and the current electrode may be obtained. Based on the longitude and latitude, the straight-line distance between the first potential electrode, the second potential electrode and the current electrode may be determined.

[0040] After determining the distance between the measured earth network and the current electrode, the distance between the measured earth network and the first potential electrode, the distance between the current electrode and the first potential electrode, the distance between the measured earth network and the second potential electrode, and the distance between the current electrode and the second potential electrode, a first test loop correction factor and a second test loop correction factor are calculated to offset the compensation resistance. Compared with the method of reducing the compensation resistance to 0 by manual measurement using the straight line three-level method in related methods, large errors and inaccurate tests caused by human factors can be avoided.

[0041] In one embodiment, based on a predetermined correction factor, the excitation current value of the excitation current, the first inter-electrode voltage value, and the second inter-electrode voltage value, determining the grounding resistance of the measured earth grid and the soil resistivity of the measured earth grid includes: determining the grounding resistance of the measured earth grid and the soil resistivity of the measured earth grid based on a correction algorithm equation group; the correction algorithm equation group is: ; in, is the grounding resistance of the measured ground grid, is the first inter-electrode voltage value, is the second inter-electrode voltage value, is the excitation current.

[0042] A first equation in the correction algorithm equation group is determined based on the first test loop and the first test loop correction factor; and a second equation in the correction algorithm equation group is determined based on the second test loop and the second test loop correction factor.

[0043] By combining the first and second equations, we can solve the unknown number. as well as , thereby realizing the determination of the grounding resistance of the measured ground grid and the soil resistivity of the measured ground grid.

[0044] In one embodiment, after determining the grounding resistance of the measured ground grid and the soil resistivity of the measured ground grid, the method further includes: Based on the resistance determination equation group, determine the grounding resistance of the first measured earth network and the grounding resistance of the second measured earth network, the measured earth network includes the first measured earth network and the second measured earth network, the first measured earth network is the grounding network corresponding to the tower grounding body, and the second measured earth network is the grounding network corresponding to the machine room grounding body; The resistance determination equation group is: ; in, is the grounding resistance of the first measured ground grid, is the grounding resistance of the second measured ground network, is a shunt current value, which is determined during the test based on a shunt collection coil arranged between the first measured earth grid and the second measured earth grid.

[0045] It should be noted that the grounding grid design of the railway system usually includes two parts: the grounding grid corresponding to the tower grounding body and the grounding grid corresponding to the machine room grounding body, which is to ensure the safety and reliability of the system. The tower usually carries communication and power equipment, and its grounding system is mainly used to prevent damage to the equipment due to lightning strikes and electrical faults. This grounding grid can effectively lead lightning current into the ground to protect the safety of equipment and personnel. The equipment and systems in the machine room require stable power supply and signal transmission. A good grounding system can reduce electromagnetic interference and ensure the stability and security of data transmission. In addition, the grounding system of the machine room can also protect the equipment from overvoltage and current.

[0046] In one embodiment, the spacing distances between the measured geogrid, the first potential electrode, the second potential electrode and the current electrode are determined based on the longitude and latitude of the measured geogrid, the longitude and latitude of the first potential electrode, the longitude and latitude of the second potential electrode and the longitude and latitude of the current electrode.

[0047] After determining the longitude and latitude of the measured ground network, the longitude and latitude of the first potential electrode, the longitude and latitude of the second potential electrode, and the longitude and latitude of the current electrode, the spacing distance between the measured ground network, the first potential electrode, the second potential electrode, and the current electrode can be determined based on the calculation of the longitude and latitude between each other.

[0048] Optionally, a test device may be pre-built to implement the test process of the ground network. The structural diagram of the constructed execution test process may be as follows: Figure 2 The test structure provided by the present invention is shown in the schematic diagram.

[0049] The first potential electrode 106, the second potential electrode 107 and the current electrode 105 are freely set near the ground network to be measured. The setting of the test electrode only needs to set the current electrode 105 at the far end in combination with the actual situation on site, and the distance between each other is greater than 5m. The specific selection position is not limited by the straight line method, and there is no need to repeatedly search for the zero potential area. On the connecting conductors of different grounding devices, a shunt collection coil 104 is installed to collect shunt current. During the test phase, the first step is to input the longitude and latitude information of each test electrode into the test device 101 as the test input parameter. The second step is to connect the first potential electrode 106, the second potential electrode 107, the current electrode 105, the shunt collection coil 104 and the connecting wires of the ground network to be measured to the test device 101 respectively, press the test key, complete the measurement of each parameter separately, and the test device 101 outputs the ground resistance result.

[0050] The equivalent circuit diagram is as follows Figure 3 The equivalent circuit diagram provided by the present invention is shown in the figure. Based on Ohm's law, an equivalent circuit diagram of a grounding method of connecting multiple ground grids is given, a mathematical relationship between the grounding resistances of multiple ground grids is proposed, and a method of inverting the independent grounding resistance of each ground grid by collecting the shunt current through the shunt coil is proposed.

[0051] Specifically, the measured earth grid G ​​formed by connecting the first measured earth grid 102 and the second measured earth grid 103 together, the first potential electrode 106 and the current electrode 105 constitute a first test loop, and the measured earth grid G, the second potential electrode 107 and the current electrode 105 constitute a second test loop.

[0052] Grounding resistance of the first measured ground grid 102 , the grounding resistance of the second measured ground grid 103 , the grounding resistance R of the measured ground grid G, the shunt current value and the excitation current value I satisfy the resistance determination equation group.

[0053] The longitude and latitude of the connection point between the test pole and the measured ground grid G ​​are input into the detection device 101, thereby obtaining the linear distance between the multiple points required for calculating the correction factor. Among them, the distance between the measured ground grid G ​​and the first potential pole 106 is , the distance between the measured ground grid G ​​and the second potential electrode 107 is The distance between the measured ground grid G ​​and the current electrode 105 is d GI , the distance between the current electrode 105 and the first potential electrode 106 is , the distance between the current electrode 105 and the second potential electrode 107 is According to the correction factors of the first test circuit and the second test circuit built into the detection device 101 and The calculation formula is used to obtain the correction factor.

[0054] Then connect the shunt collection coil 104, the first potential electrode 106, the second potential electrode 107, the current electrode 105 and the ground network G to be measured to the detection device 101, start the detection device 101 and measure the shunt current value , excitation current value I, first inter-electrode voltage value and the second inter-electrode voltage value , and substitute into the modified algorithm equation group to solve the ground resistance R and soil resistivity ρ of the measured ground grid G.

[0055] Substitute the result of the correction algorithm equation group into the resistance determination equation group to obtain the grounding resistance R of the first measured ground grid 102 A , the grounding resistance R of the second measured ground grid 103 B .

[0056] Optional, such as Figure 4 As shown in the structural diagram of the test device provided by the present invention, the test device 101 may include an acquisition circuit, a drive circuit, an A / D conversion circuit, a processor, an input circuit and peripherals, and a display circuit and peripherals.

[0057] The ground resistance detection device suitable for railway systems can be a portable device for use in different sites. First, set up the auxiliary device to ensure that the connection between the auxiliary device, the ground grid to be measured and the detection device is correct and reliable. Then, enter the function interface of the detection device and select portable measurement, set the site name (unique), number of measurements, output result warning value, longitude and latitude of the auxiliary device and other parameters. Finally, check the site to avoid people touching the ground grid or connecting wires during the test, press the test button to display the measurement results and save them automatically. For measurement results that exceed the warning value, the test device issues an alarm prompt.

[0058] The ground resistance detection device suitable for the railway system can also be a fixed device, which is set up at a certain site for a long time and has a timed measurement function. When used for the first time, a permanent auxiliary device should be set up to ensure that the connection between the auxiliary device, the measured ground network and the detection device is correct and reliably fastened, and the connection point has anti-corrosion and anti-rust capabilities. Then enter the function interface of the detection device and select long-term measurement, set the site name (unique), measurement interval (cycle), number of measurements, output result warning value, longitude and latitude of the auxiliary device and other parameters. Finally, check the site to avoid personnel touching the ground network or connecting wires during the test. Press the test button to display the measurement results, and automatically save the generated ground resistance change curve for the service life trend analysis of the ground network. For measurement results that exceed the warning value, the test device issues an alarm prompt, and the result can be remotely transmitted through the data interface of the detection device.

[0059] The grounding resistance testing device applicable to the railway system provided by the present invention is described below. The grounding resistance testing device applicable to the railway system described below and the grounding resistance testing method applicable to the railway system described above can be referred to each other.

[0060] like Figure 5 As shown, the device comprises: A first test module 510, configured to determine a first inter-electrode voltage value between a measured earth network and a first potential electrode based on a first test loop and an excitation current provided to the first test loop, wherein the first test loop is constructed based on the measured earth network, the first potential electrode and the current electrode being connected to each other; A second test module 520, for determining a second inter-electrode voltage value between the measured earth network and the second potential electrode based on a second test loop and the excitation current provided to the second test loop, wherein the second test loop is constructed based on the interconnection of the measured earth network, the second potential electrode and the current electrode, the distance between the first potential electrode, the second potential electrode and the current electrode is greater than a preset distance threshold, and they are dispersedly arranged around the measured earth network; The grounding resistance determination module 530 is used to determine the grounding resistance of the measured earth grid and the soil resistivity of the measured earth grid based on a predetermined correction factor, the excitation current value of the excitation current, the first inter-electrode voltage value and the second inter-electrode voltage value, wherein the correction factor is determined based on the spacing distance between the measured earth grid, the first potential electrode, the second potential electrode and the current electrode.

[0061] The ground resistance test device for railway system provided by the present invention offsets the compensation resistance by adding auxiliary test electrodes and introducing correction factors, and uses the optimized measurement method to construct a solution, thereby simplifying the ground resistance test method. There is no need to repeatedly measure and find the zero potential area, avoiding the error caused by manually finding the zero potential area, weakening the setting conditions of the auxiliary grounding electrode, greatly shortening the test time, and improving the accuracy of the ground resistance test.

[0062] In one embodiment, the ground resistance determination module 530 is specifically used to: The correction factors include a first test loop correction factor and a second test loop correction factor; The first test loop correction factor is: ; The second test loop correction factor is: ; in, is the first test loop correction factor, is the distance between the measured ground grid and the current electrode, is the distance between the measured ground grid and the first potential electrode, is the distance between the current electrode and the first potential electrode, is the second test loop correction factor, is the distance between the measured ground grid and the second potential electrode, is the distance between the current electrode and the second potential electrode.

[0063] In one embodiment, the ground resistance determination module 530 is further specifically configured to: The method of determining the grounding resistance of the measured earth grid and the soil resistivity of the measured earth grid based on the predetermined correction factor, the excitation current value of the excitation current, the first inter-electrode voltage value, and the second inter-electrode voltage value comprises: Based on the correction algorithm equation group, determining the ground resistance of the measured ground grid and the soil resistivity of the measured ground grid; The correction algorithm equation group is: ; in, is the grounding resistance of the measured ground grid, is the first inter-electrode voltage value, is the second inter-electrode voltage value, is the excitation current.

[0064] In one embodiment, the ground resistance determination module 530 is further specifically configured to: After determining the grounding resistance of the measured ground grid and the soil resistivity of the measured ground grid, the method further includes: Based on the resistance determination equation group, determine the grounding resistance of the first measured earth network and the grounding resistance of the second measured earth network, the measured earth network includes the first measured earth network and the second measured earth network, the first measured earth network is the grounding network corresponding to the tower grounding body, and the second measured earth network is the grounding network corresponding to the machine room grounding body; The resistance determination equation group is: ; in, is the grounding resistance of the first measured ground grid, is the grounding resistance of the second measured ground network, is a shunt current value, which is determined during the test based on a shunt collection coil arranged between the first measured earth grid and the second measured earth grid.

[0065] In one embodiment, the ground resistance determination module 530 is further specifically configured to: The spacing distances between the measured geogrid, the first potential electrode, the second potential electrode and the current electrode are determined based on the longitude and latitude of the measured geogrid, the longitude and latitude of the first potential electrode, the longitude and latitude of the second potential electrode and the longitude and latitude of the current electrode.

[0066] The present invention also provides a testing device, comprising the above-mentioned ground resistance testing device applicable to a railway system.

[0067] Figure 6 An example of a physical structure diagram of an electronic device is shown in FIG. Figure 6 Said electronic device may include: a processor 610, a communication interface 620, a memory 630 and a communication bus 640, wherein the processor 610, the communication interface 620 and the memory 630 communicate with each other through the communication bus 640. The processor 610 may call the logic instructions in the memory 630 to execute a ground resistance test method applicable to a railway system, the method comprising: determining a first inter-electrode voltage value between a measured earth network and a first potential electrode based on a first test loop and an excitation current provided to the first test loop, wherein the first test loop is constructed based on the interconnection of the measured earth network, the first potential electrode and the current electrode; Based on a second test loop and the excitation current provided to the second test loop, a second inter-electrode voltage value between the measured earth network and the second potential electrode is determined, wherein the second test loop is constructed based on the interconnection of the measured earth network, the second potential electrode and the current electrode, and the distances between the first potential electrode, the second potential electrode and the current electrode are greater than a preset distance threshold, and are dispersedly arranged around the measured earth network; Based on a predetermined correction factor, the excitation current value of the excitation current, the first inter-electrode voltage value and the second inter-electrode voltage value, the grounding resistance of the measured earth grid and the soil resistivity of the measured earth grid are determined, and the correction factor is determined based on the spacing distance between the measured earth grid, the first potential electrode, the second potential electrode and the current electrode.

[0068] In addition, the logic instructions in the above-mentioned memory 630 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0069] On the other hand, the present invention further provides a computer program product, the computer program product includes a computer program, the computer program can be stored in a non-transitory computer-readable storage medium, when the computer program is executed by a processor, the computer can execute the ground resistance test method applicable to the railway system provided by the above methods, the method comprising: based on a first test loop and an excitation current provided to the first test loop, determining a first inter-electrode voltage value between a measured ground grid and a first potential electrode, the first test loop being constructed based on the interconnection of the measured ground grid, the first potential electrode and the current electrode; Based on a second test loop and the excitation current provided to the second test loop, a second inter-electrode voltage value between the measured earth network and the second potential electrode is determined, wherein the second test loop is constructed based on the interconnection of the measured earth network, the second potential electrode and the current electrode, and the distances between the first potential electrode, the second potential electrode and the current electrode are greater than a preset distance threshold, and are dispersedly arranged around the measured earth network; Based on a predetermined correction factor, the excitation current value of the excitation current, the first inter-electrode voltage value and the second inter-electrode voltage value, the grounding resistance of the measured earth grid and the soil resistivity of the measured earth grid are determined, and the correction factor is determined based on the spacing distance between the measured earth grid, the first potential electrode, the second potential electrode and the current electrode.

[0070] In another aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, which is implemented when the computer program is executed by a processor to execute the ground resistance test method applicable to a railway system provided by the above-mentioned methods, the method comprising: determining a first inter-electrode voltage value between a measured ground grid and a first potential electrode based on a first test loop and an excitation current provided to the first test loop, wherein the first test loop is constructed based on the interconnection of the measured ground grid, the first potential electrode and the current electrode; Based on a second test loop and the excitation current provided to the second test loop, a second inter-electrode voltage value between the measured earth network and the second potential electrode is determined, wherein the second test loop is constructed based on the interconnection of the measured earth network, the second potential electrode and the current electrode, and the distances between the first potential electrode, the second potential electrode and the current electrode are greater than a preset distance threshold, and are dispersedly arranged around the measured earth network; Based on a predetermined correction factor, the excitation current value of the excitation current, the first inter-electrode voltage value and the second inter-electrode voltage value, the grounding resistance of the measured earth grid and the soil resistivity of the measured earth grid are determined, and the correction factor is determined based on the spacing distance between the measured earth grid, the first potential electrode, the second potential electrode and the current electrode.

[0071] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0072] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A ground resistance testing method suitable for a railway system, characterized in that: The method comprises: Determine a first inter-electrode voltage value between the earth network under test and the first potential electrode based on a first test loop and an excitation current provided to the first test loop, wherein the first test loop is constructed based on the earth network under test, the first potential electrode and the current electrode being connected to each other; Based on a second test loop and the excitation current provided to the second test loop, a second inter-electrode voltage value between the measured earth network and the second potential electrode is determined, wherein the second test loop is constructed based on the interconnection of the measured earth network, the second potential electrode and the current electrode, and the distances between the first potential electrode, the second potential electrode and the current electrode are greater than a preset distance threshold, and are dispersedly arranged around the measured earth network; Based on a predetermined correction factor, the excitation current value of the excitation current, the first inter-electrode voltage value and the second inter-electrode voltage value, the grounding resistance of the measured earth grid and the soil resistivity of the measured earth grid are determined, and the correction factor is determined based on the spacing distance between the measured earth grid, the first potential electrode, the second potential electrode and the current electrode.

2. The ground resistance testing method applicable to a railway system according to claim 1, characterized in that: The correction factors include a first test loop correction factor and a second test loop correction factor; The first test loop correction factor is: ； The second test loop correction factor is: ； in, is the first test loop correction factor, is the distance between the measured ground grid and the current electrode, is the distance between the measured ground grid and the first potential electrode, is the distance between the current electrode and the first potential electrode, is the second test loop correction factor, is the distance between the measured ground grid and the second potential electrode, is the distance between the current electrode and the second potential electrode.

3. The ground resistance testing method applicable to a railway system according to claim 2, characterized in that: The method of determining the grounding resistance of the measured earth grid and the soil resistivity of the measured earth grid based on the predetermined correction factor, the excitation current value of the excitation current, the first inter-electrode voltage value, and the second inter-electrode voltage value comprises: Based on the correction algorithm equation group, determining the ground resistance of the measured ground grid and the soil resistivity of the measured ground grid; The correction algorithm equation group is: ； in, is the grounding resistance of the measured ground grid, is the first inter-electrode voltage value, is the second inter-electrode voltage value, is the excitation current.

4. The ground resistance testing method applicable to a railway system according to claim 3, characterized in that: After determining the grounding resistance of the measured ground grid and the soil resistivity of the measured ground grid, the method further includes: Based on the resistance determination equation group, determine the grounding resistance of the first measured earth network and the grounding resistance of the second measured earth network, the measured earth network includes the first measured earth network and the second measured earth network, the first measured earth network is the grounding network corresponding to the tower grounding body, and the second measured earth network is the grounding network corresponding to the machine room grounding body; The resistance determination equation group is: ； in, is the grounding resistance of the first measured ground grid, is the grounding resistance of the second measured ground network, is a shunt current value, which is determined during the test based on a shunt collection coil arranged between the first measured earth grid and the second measured earth grid.

5. The ground resistance testing method applicable to a railway system according to claim 3, characterized in that: The spacing distances between the measured geogrid, the first potential electrode, the second potential electrode and the current electrode are determined based on the longitude and latitude of the measured geogrid, the longitude and latitude of the first potential electrode, the longitude and latitude of the second potential electrode and the longitude and latitude of the current electrode.

6. A ground resistance test device suitable for a railway system, characterized in that: include: A first test module, used to determine a first inter-electrode voltage value between a measured earth network and a first potential electrode based on a first test loop and an excitation current provided to the first test loop, wherein the first test loop is constructed based on the measured earth network, the first potential electrode and the current electrode being connected to each other; A second test module, for determining a second inter-electrode voltage value between the measured earth network and the second potential electrode based on a second test loop and the excitation current provided to the second test loop, wherein the second test loop is constructed based on the interconnection of the measured earth network, the second potential electrode and the current electrode, the distance between the first potential electrode, the second potential electrode and the current electrode is greater than a preset distance threshold, and they are dispersedly arranged around the measured earth network; A grounding resistance determination module is used to determine the grounding resistance of the measured ground grid and the soil resistivity of the measured ground grid based on a predetermined correction factor, the excitation current value of the excitation current, the first inter-electrode voltage value and the second inter-electrode voltage value, wherein the correction factor is determined based on the spacing distance between the measured ground grid, the first potential electrode, the second potential electrode and the current electrode.

7. A testing device, characterized in that: It comprises the ground resistance testing device suitable for railway system as claimed in claim 6.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the ground resistance testing method applicable to a railway system as claimed in any one of claims 1 to 6 is implemented.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the ground resistance testing method applicable to a railway system as claimed in any one of claims 1 to 6 is implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the ground resistance testing method applicable to a railway system as claimed in any one of claims 1 to 6 is implemented.

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